Vap Poya Vap full moon poya day is of special significance especially for Buddhists in Sri Lanka because of Katina Cheevara puja the offering of wet season robes to Buddhist priests who Vap Poya Lakpura Vap Full Moon Poya, today Sri Lanka Mirror Right to Know. Power to Change RHO Vap Poya This public holiday in Sri Lanka takes place on the full moon day of Vap, the seventh month in the Sinhalese calendar. It usually falls in October in Vap full moon paya day J News Vap Poya commemorates many religious events including the appointing of Sariputta Maha Thera as the Chief Disciple of the Buddha, the future Buddha to be Maitriya Bodhisattva's entering the Bhikkusasana, King